<template>
  <el-container>
    <el-header>
      <span @click="logo()">后台管理系统</span>
      <el-button type="primary" v-on:click="logout">注销</el-button>
    </el-header>
    <el-container>
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse()">|||</div>
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409eff"
          :unique-opened="true"
          :collapse="isCollapse"
          :collapse-transition="false"
          :router="true"
          :default-active="activePath">
          <!-- 一级菜单 -->
          <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
            <!-- 一级菜单模板区 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="menuObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>

            <!-- 二级菜单 -->
            <el-menu-item
            :index="'/' +subItem.path"
            v-for="subItem in item.children"
            :key="subItem.id"
            @click="saveNavState('/' +subItem.path)">
              <template slot="title">
              <!-- 图标 -->
              <i class="el-icon-location"></i>
              <!-- 文本 -->
              <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      menulist: [],
      menuObj: {
        '125': 'iconfont icon-user',
        '103': 'iconfont icon-tijikongjian',
        '101': 'iconfont icon-shangpin',
        '102': 'iconfont icon-danju',
        '145': 'iconfont icon-baobiao'
      },
      isCollapse: false,
      activePath: ''
    }
  },
  methods: {
    logout() {
      window.sessionStorage.removeItem('token')
      this.$router.push('/login')
      this.$message.success('已成功注销')
    },
    logo() {
      this.$router.push('/welcome')
    },
    async getMenuList() {
      let res = await this.$http.get('menus')
      // console.log(res)
      if (res.data.meta.status !== 200) {
        return this.$message.error(res.data.meta.msg)
      } else if (res.data.meta.status === 200) {
        this.menulist = res.data.data
      }
    },
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  }
}
</script>

<style lang="less" scoped>
.el-container {
  height: 100%;
  .el-header {
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    align-content: center;
    color: #fff;
    span {
      cursor: pointer;
      font-size: 28px;
      margin-left: 15px;
    }
  }
  .el-aside {
    background-color: #333744;
    .el-menu {
      border-right: none;
    }
    .toggle-button {
      background-color: #4a5064;
      font-size: 16px;
      line-height: 24px;
      color: #fff;
      text-align: center;
      letter-spacing: 0.2em;
      cursor: pointer;
    }
  }
  .el-main {
    background-color: #eaedf1;
  }
}
.iconfont {
  margin-right: 15px;
}

</style>
